{
  "modelspec": "1.0-draft",
  "module": {
    "id": "github.com/demo-db/employees/employees",
    "name": "employees",
    "version": "0.1.0"
  },
  "entities": {
    "departments": {
      "key": [
        "dept_no"
      ],
      "properties": {
        "dept_no": {
          "required": true,
          "type": "string"
        },
        "dept_name": {
          "required": true,
          "type": "string"
        }
      }
    },
    "dept_emp": {
      "key": [
        "emp_no",
        "dept_no"
      ],
      "properties": {
        "emp_no": {
          "required": true,
          "entity": "employees"
        },
        "dept_no": {
          "required": true,
          "entity": "departments"
        },
        "from_date": {
          "required": true,
          "type": "string"
        },
        "to_date": {
          "required": true,
          "type": "string"
        }
      }
    },
    "dept_manager": {
      "key": [
        "emp_no",
        "dept_no"
      ],
      "properties": {
        "emp_no": {
          "required": true,
          "entity": "employees"
        },
        "dept_no": {
          "required": true,
          "entity": "departments"
        },
        "from_date": {
          "required": true,
          "type": "string"
        },
        "to_date": {
          "required": true,
          "type": "string"
        }
      }
    },
    "employees": {
      "key": [
        "emp_no"
      ],
      "properties": {
        "emp_no": {
          "required": true,
          "type": "int"
        },
        "birth_date": {
          "required": true,
          "type": "string"
        },
        "first_name": {
          "required": true,
          "type": "string"
        },
        "last_name": {
          "required": true,
          "type": "string"
        },
        "gender": {
          "required": true,
          "type": "string"
        },
        "hire_date": {
          "required": true,
          "type": "string"
        }
      }
    },
    "salaries": {
      "key": [
        "emp_no",
        "from_date"
      ],
      "properties": {
        "emp_no": {
          "required": true,
          "entity": "employees"
        },
        "salary": {
          "required": true,
          "type": "int"
        },
        "from_date": {
          "required": true,
          "type": "string"
        },
        "to_date": {
          "required": true,
          "type": "string"
        }
      }
    },
    "titles": {
      "key": [
        "emp_no",
        "title",
        "from_date"
      ],
      "properties": {
        "emp_no": {
          "required": true,
          "entity": "employees"
        },
        "title": {
          "required": true,
          "type": "string"
        },
        "from_date": {
          "required": true,
          "type": "string"
        },
        "to_date": {
          "type": "string"
        }
      }
    }
  }
}